Sunsea AIoT SIMCom SIM7600NA User Manual page 43

Users should provide 2.85V to power SD card system and the current should more than 350mA,
which is showed below as VCC_SD. ESD/EMI components should be arranged beside SD card
socket. Refer to the following application circuit.
Users should provide 2.85V to power eMMC card system and 1.8V to power the
SDIO_DATA/CMD/CLK signals. The source of 2.85V should be able to provide more than
500mA* which showed below as VCC_eMMC, as the source of 1.8V should be able to
provide more than 300mA* which showed below as VCCQ_1V8. ESD/EMI components
should be arranged close to the eMMC card. Refer to the following application circuit.
Module
SD_CMD
RESOUT_N
SD_CLK
SD_DATA0
SD_DATA1
SD_DATA2
SD_DATA3
*NOTE: For the current of VCC_eMMC and VCCQ_1V8, users should better refer to the
SIM7600NA_user manual _V1.00
Figure29: SD reference circuit
VCC_eMMC
VCCQ_1V8
VCCQ_1V8
Figure 30: eMMC reference circuit
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Smart Machine Smart Decision
eMMC
VCC
VCC
VCC
VCC
VCCQ
VCCQ
VCCQ
VCCQ
VDDIM
CMD
RST
CLK
D0
D1
D2
D3
D4
D5
D6
D7
DS
2020-1-7